Military slang for "the person who takes charge and gets shit done."
This person is not necessarily the highest ranking in the group.

You come upon a bunch of people standing around a vehicle with a flat tire, smoking and joking. You notice there is a leadership vacuum - no one is taking charge, so you ask, "Who is fucking the chicken here? Where's the chicken fucker?" in such a way that inspires the most ambitious and motivated person to step forward into a strong leadership role.

A "Chicken Fucker" is not only one who gets off fucking chickens, used as slang in a movie, and also a drink (shot) which is 1/2 oz. of wild turkey, 1/2 oz. of tequilla and a 1/2 oz. of beer, but also used in many ways as a conversation starter or opening or expression of strong emphasis towards friends or even used to make no sense. SEE EXAMPLES BELOW!

The Jas Jibberish definition: A constipated vigor of dan rather near the end finds out sara hasn't even been there, goes for another chance at the world cup, and can't believe I am here even in spirit under a vast quantity of George Bush Sauce.

1.Sup Chicken Fucker!
2.Matt Is A Chicken Fucker.
3.Dude, Stop Being A Chicken Fucker.
4.(To Old Lady With Walker On Side Of Street Walking Dog) CHICKEN FUCKER!!! (and then duck down and hide)
5.Have A Chicken Johnson Fucker!!